低流量下等高差自然循环系统倒流现象实验研究(<sup>1</sup> 哈尔滨工程大学核安全与仿真技术国防重点实验室，黑龙江 哈尔滨 150001; <sup>2</sup> 中国核动力研究设计院核反应堆系统设计技术重点实验室，四川 成都 610213)

Jianchuang SUN; Xiaxin CAO; Xu RAN; Zhuohua ZHANG; Zhengpeng MI; Ming DING

doi:10.11949/0438-1157.20190407

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低流量下等高差自然循环系统倒流现象实验研究(¹ 哈尔滨工程大学核安全与仿真技术国防重点实验室，黑龙江哈尔滨 150001; ² 中国核动力研究设计院核反应堆系统设计技术重点实验室，四川成都 610213)

流体力学与传递现象 | 更新时间：2020-06-24

- 低流量下等高差自然循环系统倒流现象实验研究(¹ 哈尔滨工程大学核安全与仿真技术国防重点实验室，黑龙江哈尔滨 150001; ² 中国核动力研究设计院核反应堆系统设计技术重点实验室，四川成都 610213)
- Experimental research on reverse flow phenomenon in natural circulation with equal height difference under low flow rate
- 化工学报 2019年70卷第11期页码：4231-4237
- 作者机构：
  
  1.Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, Heilongjiang, China
  2.Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, Sichuan, China
- 作者简介：
  
  丁铭（1980—），男，博士，教授，dingming@hrbeu.edu.cn
- 基金信息：
  
  国家自然科学基金项目(11605033;11875117)
- DOI：10.11949/0438-1157.20190407
  中图分类号： TK 124
- 收稿：2019-04-18，
  
  修回：2019-08-02，
  
  纸质出版：2019-11-05
- 稿件说明：
移动端阅览
孙建闯, 曹夏昕, 冉旭, 张卓华, 米争鹏, 丁铭. 低流量下等高差自然循环系统倒流现象实验研究[J]. 化工学报, 2019, 70(11): 4231-4237

SUN Jianchuang, CAO Xiaxin, RAN Xu, ZHANG Zhuohua, MI Zhengpeng, DING Ming. Experimental research on reverse flow phenomenon in natural circulation with equal height difference under low flow rate[J]. CIESC Journal, 2019, 70(11): 4231-4237
孙建闯, 曹夏昕, 冉旭, 张卓华, 米争鹏, 丁铭. 低流量下等高差自然循环系统倒流现象实验研究[J]. 化工学报, 2019, 70(11): 4231-4237 DOI： 10.11949/0438-1157.20190407.

SUN Jianchuang, CAO Xiaxin, RAN Xu, ZHANG Zhuohua, MI Zhengpeng, DING Ming. Experimental research on reverse flow phenomenon in natural circulation with equal height difference under low flow rate[J]. CIESC Journal, 2019, 70(11): 4231-4237 DOI： 10.11949/0438-1157.20190407.

摘要

自然循环系统由于具有固有安全性而被广泛应用于核电站中。等高差自然循环系统是一种特殊的系统，其加热段与水箱之间是通过上下水平段连接。在低流量条件下，这类自然循环系统会发生水箱冷水倒流至上水平段的现象，目前对该现象的研究并不常见。对等高度差自然循环系统的上水平段倒流特性进行了可视化实验研究。实验结果表明，上水平段倒流长度随流量的增加而减小，随着加热段出口流体与倒流流体温差的增大而增加。研究发现，上水平段倒流现象主要受加热段出口流体惯性力和与倒流流体形成的浮升力共同影响，并且倒流现象的发生可以通过Richardson数来判定。

Abstract

Natural circulation systems are widely used in nuclear power plants due to their inherent safety. Natural circulation system with equal height different is a special system

because its heating section and water tank are connected by upper and lower horizontal loops. However

the phenomenon that the water in water tank reversely flows to the upper horizontal loop will be occurred in this kind of natural circulation system under low flow rate conditions. The studies of this phenomenon are not common. The reverse flow characteristics of upper horizontal loop is researched by visualization experiments. The results show that the reverse flow length in the upper horizontal loop decreases with the increase of flow rate

and increases with the increase of temperature difference between the outlet fluid of heater and the reverse flow fluid form water tank. It is found that the reverse flow in the upper horizontal loop is mainly affected by the inertia force of the hot water and the buoyancy force formed by the hot water and the reverse flow fluid. In addition

the reverse flow phenomenon in the upper horizontal loop can be judged by Richardson number.

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references

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低流量下等高差自然循环系统倒流现象实验研究(1 哈尔滨工程大学核安全与仿真技术国防重点实验室，黑龙江 哈尔滨 150001; 2 中国核动力研究设计院核反应堆系统设计技术重点实验室，四川 成都 610213)

Experimental research on reverse flow phenomenon in natural circulation with equal height difference under low flow rate

DOI：10.11949/0438-1157.20190407

摘要

Abstract

关键词

Keywords

references

低流量下等高差自然循环系统倒流现象实验研究(¹ 哈尔滨工程大学核安全与仿真技术国防重点实验室，黑龙江哈尔滨 150001; ² 中国核动力研究设计院核反应堆系统设计技术重点实验室，四川成都 610213)